Electromagnetic analysis and simulation aspects of wireless power transfer in the domain of inductive power transmission technology

Abstract

Wireless power transfer (WPT) technologies have now reached a commercial stage in applications going from consumer electronics, biomedical implants and domestic applications. For electrical cars, WPT offers some new opportunities compared to classical wired charging. Although there exist some commercial cars equipped with wireless charging system, improving design procedures needs to address various domains including power electronics, components and electromagnetics. The magnetic coupling system is a key component of wireless power transfer: the coils and surrounding materials have a great impact on the efficiency of the transfer as well as the level of the stray field near the system. The paper aims to present three essential features regarding the inductive power transfer dedicated to electric vehicles. The first one addresses the topology and efficiency of the coupling system, the second one underlines the human exposure considerations and the third one deals with the impact of uncertainties regarding system parameters.

Near‐field wireless power transfer used in biomedical implants: A comprehensive review

“…A tunning circuit is added to maintain the system resonance should the transfer distance significantly increase or if misalignment occurs. The transferred power is transmitted only to receivers operating at the same resonance frequency in the resonance system [18,71]. However, the maximum transfer efficiency achieved at the resonance frequency [72].…”

“…WPT technologies based on electromagnetic fields can be divided into two categories according to the coupling region between the transmitting antenna and receiving antenna: (i) Non‐radiative region, or near‐field region, and (ii) radiative region, or far‐field region [18]. The difference between near‐field and far‐field WPTs is the distance across which energy is transferred and the operating frequency [19].…”

Magnetic Flux Density Measurement Platform for an Inductive Wireless Power Transmitter Coil Design

“…The shape and direction of the magnetic field radiated by the transmitter coil is determined by the shape of the coil, the number of turns, the diameter of the wire, and other physical parameters [4][5][6][7][8][9]. The strength of the transmitter coil field is determined by the physical parameters of the coil and the primary excitation current.…”